1 files changed, 13 insertions, 1 deletions

diff --git a/arch/mips/mach-mt7620/cpu.c b/arch/mips/mach-mt7620/cpu.c
index 87cc973b75..9e0ca716f7 100644
--- a/arch/mips/mach-mt7620/cpu.c
+++ b/arch/mips/mach-mt7620/cpu.c
@@ -89,9 +89,21 @@ void watchdog_reset(void)
                 wdt_reset(watchdog_dev);
         }
 }
+#endif
 
 int arch_misc_init(void)
 {
+        /*
+         * It has been noticed, that sometimes the d-cache is not in a
+         * "clean-state" when U-Boot is running on MT7688. This was
+         * detected when using the ethernet driver (which uses d-cache)
+         * and a TFTP command does not complete. Flushing the complete
+         * d-cache (again?) here seems to fix this issue.
+         */
+        flush_dcache_range(gd->bd->bi_memstart,
+                           gd->bd->bi_memstart + gd->ram_size - 1);
+
+#ifdef CONFIG_WATCHDOG
         /* Init watchdog */
         if (uclass_get_device_by_seq(UCLASS_WDT, 0, &watchdog_dev)) {
                 debug("Watchdog: Not found by seq!\n");
@@ -103,7 +115,7 @@ int arch_misc_init(void)
 
         wdt_start(watchdog_dev, 60000, 0);      /* 60 seconds */
         printf("Watchdog: Started\n");
+#endif
 
         return 0;
 }
-#endif